Thill-coupling.



No. 639,4!5. Patented Dec. I9, |399.

G. B. LUTZ.

THILL COUPLING.

Application filed Apr. 6. 1899..

:No Model..A

/Fn Z Wy llNiTnn STATES PATnNT Trios.

GEORGE B. LUTZ, OF BOILING SPRINGS, PENNSYLVANIA.

THILL-'COU PLI NG.

SPECIFICATION forming part of Letters Patent No. 639,415, dated December 19, 1899.

Application filed pril 6,1899. Serial No. 711,983. (No model.)

To all whom it may concern:

Be it known that I, GEORG-E B. LUTZ, a citizen of the United States, residing at Boiling Springs, in the county of Cumberland, State of Pennsylvania, have invented certain new and useful Improvements in 'Phill-Couplings; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the Io art to which it appertains to make and use the same.

`My invention relates to thill-couplings, and has for its object to produce a cheap and effective device of 4this nature which may be easily manufactured, which may be readily adjusted, and which will act to compensate for the excessive wear in this class of devices and insure a tight iitting of the parts at all times.

zo In the drawings forming a portion of this 3o vehicle-axle in the ordinary manner and which clevis is provided with two horizontally-projecting and parallel ears b and c, having perforations in alinement and tapered inwardly.

Adapted to iit snugly the perforations in the ears b and c are frusto-conical bearingblocks cl and e, having angular bases f and g,

respectively, adapted to receive a wrench to facilitate adjustment of the blocks upon a 4o common spindle h, the ends of which spin- `dle are screw-threaded and engage threads formed interiorly of the longitudinal perforations in the blocks. rlhus by manipulation of the blocks with a wrench, as above intimated, the blocks may be drawn inwardly and caused to fit snugly their respective perfora* tions of the clevis-ears.

To prevent accidental displacement of the blocks d and e, jam-nuts i and 7a are placed 5o upon the ends of spindle h and may be caused to impinge the blocks and cause jamming in the usual manner.

It will be noted that that portion of the spiudle h intermediate the threaded portions is squared, which formation is adapted to permit slidable connection with the iron Z of the cooperating shaft end and prevent independent oscillation thereof. Hence as the shafts are raised and lowered their oscillatory motion will be communicated to the spindle h, which, having the blocks d and e jammed thereon, will communicate the motion to said blocks, and the only wear in the entire construction will be between said blocks and their respective clevis-ears. Moreover, it will be noted that by manipulation of the blocks and their jam-nuts all wear may be taken up and intimate connection of the blocks and ears may be maintained, while at the same time the shaft-irons may be held firmly, yet easily, centered between the clevis-ears.

It will be readily understood that I may vary the specific form and arrangement of my invention, and also that I may construct it of any desired material, without departing from the spirit of my invention.

Having thus described myinvention, what I claim is- In a thill-coupling, the combination with a clevis having parallel ears separated byan interspace,said ears having alining perforations tapered toward each other, friction-blocks rotatably mounted in said perforations and tapered to fit therein, said blocks having alining perforations provided With screw-threads, a spindle having its ends threaded and engaged with the threads of the perforations in the blocks, and on which said blocks are adj ustable, said spindle being squared intermediate the threaded portions and intermediate the ears, jam-nuts upon'the ends of the spindie adapted to hold the blocks in place, and a thill-iron having a squared opening through which the squared portion of the spindle is passed, said iron lying against the inner faces of the ears, and the outer ends of the frictionblocks having integral squared portions for the reception of adjusting means.

In testimony whereof I affix signature in presence of two witnesses.

GEORGE B. LUTZ.

Witnesses:

W. B. PHILLIPY, JOHN BAsHoRE. 

